Approval and Promulgation of Air Quality Implementation Plans; Virginia; Fredericksburg 8-Hour Ozone Maintenance Area Revision to Approved Motor Vehicle Emissions Budgets

الملخص

EPA is approving the Commonwealth of Virginia's State Implementation Plan (SIP) revision submitted by the Virginia Department of Environmental Quality (VADEQ) on September 26, 2011. The SIP revision updates the 2009 and 2015 motor vehicle emission budgets (MVEBs) in the Fredericksburg 8-Hour Ozone Maintenance Area (Fredericksburg Area) by replacing the previously approved MVEBs with budgets developed using EPA's Motor Vehicle Emissions Simulator emissions model (MOVES2010a). The revised MVEBs continue to demonstrate maintenance of the 1997 8-hour national ambient air quality standard (NAAQS) for ozone. This action is being taken under the Clean Air Act (CAA).